package me.huha.zhime.utils;

import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.imageio.stream.ImageOutputStream;

import me.huha.spring.Utils;
import me.huha.tools.NonceUtils;
import me.huha.zhime.constant.Constant;

import org.apache.commons.io.FilenameUtils;

import sun.misc.BASE64Encoder;

import com.github.tobato.fastdfs.domain.StorePath;
import com.github.tobato.fastdfs.service.FastFileStorageClient;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
 * @Title: QRCodeUtil
 * @Author: Yepx
 * @mail: yepx2013@gmail.com
 * @CreateTime: 2017年10月26日 上午10:11:32
 * @Todo: 二维码生成工具类
 */
public class QRCodeUtil {
	
	private static final String CHARSET = "utf-8";
    private static final String FORMAT_NAME = "PNG";
    // 二维码尺寸
    private static final int QRCODE_SIZE = 300;
    // LOGO宽度
    private static final int WIDTH = 45;
    // LOGO高度
    private static final int HEIGHT = 45;
    
    public static String qRCodeImgAndUpload(String url){
    	
    	String picUrl = null;
    	try {
    		BufferedImage imgBar = createImage(url, null, false);
    		
    		ByteArrayOutputStream bs = new ByteArrayOutputStream();  
    		ImageOutputStream imOut = ImageIO.createImageOutputStream(bs);  
    		ImageIO.write(imgBar, FORMAT_NAME, imOut);  
    		
    		InputStream is = new ByteArrayInputStream(bs.toByteArray());
    		
    		//TODO 创建临时文件
    		String temp = "temp";
    		//TODO 判断目录是否存在
    		Boolean isExis = FileOperateUtils.exisFolder(temp);
    		if(!isExis)
    			//TODO 创建文件夹
    			FileOperateUtils.createFolder(temp);
    		
    		String pathStr = temp +"/"+ NonceUtils.randomHexLong() + ".png";
	        System.out.println(pathStr);
	        
            File file = new File(pathStr);
    		OutputStream os = new FileOutputStream(file);
    		int bytesRead = 0;
    		byte[] buffer = new byte[8192];
    		while ((bytesRead = is.read(buffer, 0, 8192)) != -1) {
    		os.write(buffer, 0, bytesRead);
    		}
    		os.close();
    		is.close();
    		
    		
    		//ResourceBundle resource = ResourceBundle.getBundle("config/config");//test为属性文件名，放在包com.mmq下，如果是放在src下，直接用test即可 
			//String uploadUrl = resource.getString("uploadUrl");//Diamond.getConfig("zhime.addressbook.im.config.url", "DEFAULT_GROUP", 1000);
			
    		//TODO 文件上传
    		//picUrl = ApiUploads.getInstance(uploadUrl).uploadWait(file, 1, TimeUnit.SECONDS).toString();
			
			//使用fastdfs 上传
  	        FileInputStream inputStream = new FileInputStream(file);
  	        FastFileStorageClient storageClient = Utils.Container.getBean(FastFileStorageClient.class);
  	        StorePath storePath = storageClient.uploadFile(Constant.FASTDFS_GroupName, inputStream, file.length(), FilenameUtils.getExtension(file.getName()));
  	        picUrl = Constant.FASTDFS_Domain.concat("/").concat(storePath.getFullPath());
  	         
    		file.deleteOnExit();
    	} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    	
    	return picUrl;
    }
    
    /**
     * 生成一张base64的二维码
     * @param url
     * @return
     */
    public static String qRCodeImgByBase64(String url){
    	
    	String base64 = null;
    	
    	try {
    		BufferedImage imgBar = createImage(url, null, false);
    		
    		ByteArrayOutputStream bs = new ByteArrayOutputStream();  
    		ImageOutputStream imOut = ImageIO.createImageOutputStream(bs);  
    		ImageIO.write(imgBar, FORMAT_NAME, imOut);  
    		
    		//InputStream is = new ByteArrayInputStream(bs.toByteArray());
    		
    		//使用 FileOutputStream 本地生成 png 文件
    		/*FileOutputStream fos = new FileOutputStream("D:/test.png");  
    		byte[] b = new byte[10*1024];  
    		while(is.read(b,0,10240) != -1){  
    		  fos.write(b,0,10240);  
    		}  
    		fos.flush();
    		fos.close();*/
    		
    		BASE64Encoder encoder = new BASE64Encoder();
    		base64 = encoder.encode(bs.toByteArray());// 返回Base64编码过的字节数组字符串
    		base64 = "data:image/jpg;base64," + base64;
    		
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
        
    	return base64;
    }
    
	private static BufferedImage createImage(String content, String imgPath,
            boolean needCompress) throws Exception {
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
                BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000
                        : 0xFFFFFFFF);
            }
        }
        if (imgPath == null || "".equals(imgPath)) {
            return image;
        }
        // 插入图片
        QRCodeUtil.insertImage(image, imgPath, needCompress);
        return image;
    }

   
    private static void insertImage(BufferedImage source, String imgPath,
            boolean needCompress) throws Exception {
        File file = new File(imgPath);
        if (!file.exists()) {
            System.err.println(""+imgPath+"   该文件不存在！");
            return;
        }
        Image src = ImageIO.read(new File(imgPath));
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) { // 压缩LOGO
            if (width > WIDTH) {
                width = WIDTH;
            }
            if (height > HEIGHT) {
                height = HEIGHT;
            }
            Image image = src.getScaledInstance(width, height,
                    Image.SCALE_SMOOTH);
            BufferedImage tag = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null); // 绘制缩小后的图
            g.dispose();
            src = image;
        }
        // 插入LOGO
        Graphics2D graph = source.createGraphics();
        int x = (QRCODE_SIZE - width) / 2;
        int y = (QRCODE_SIZE - height) / 2;
        graph.drawImage(src, x, y, width, height, null);
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
        graph.setStroke(new BasicStroke(3f));
        graph.draw(shape);
        graph.dispose();
    }

   
    public static void encode(String content, String imgPath, String destPath,
            boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,
                needCompress);
        mkdirs(destPath);
        String file = new Random().nextInt(99999999)+".png";
        ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
    }

   
    public static void mkdirs(String destPath) {
        File file =new File(destPath);   
        //当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }
    }

   
    public static void encode(String content, String imgPath, String destPath)
            throws Exception {
        QRCodeUtil.encode(content, imgPath, destPath, false);
    }

   
    public static void encode(String content, String destPath,
            boolean needCompress) throws Exception {
        QRCodeUtil.encode(content, null, destPath, needCompress);
    }

   
    public static void encode(String content, String destPath) throws Exception {
        QRCodeUtil.encode(content, null, destPath, false);
    }

   
    public static void encode(String content, String imgPath,
            OutputStream output, boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,
                needCompress);
        ImageIO.write(image, FORMAT_NAME, output);
    }
    
    public static void encode(String content, OutputStream output)
            throws Exception {
        QRCodeUtil.encode(content, null, output, false);
    }

   
    public static String decode(File file) throws Exception {
        BufferedImage image;
        image = ImageIO.read(file);
        if (image == null) {
            return null;
        }
        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
        
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Result result;
        Hashtable hints = new Hashtable();
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
        result = new MultiFormatReader().decode(bitmap, hints);
        String resultStr = result.getText();
        return resultStr;
    }

   
    public static String decode(String path) throws Exception {
        return QRCodeUtil.decode(new File(path));
    }
   
    public static BufferedImage codeBufferedImage(String content, String imgPath, boolean needCompress)throws Exception {
    	 BufferedImage image = QRCodeUtil.createImage(content, imgPath,
                 needCompress);
    	 return image;
    }
}
